/Engine/Source/Runtime/Engine/Classes/PhysicsEngine/BodyInstance.h
Get the complex PhysicalMaterials and PhysicalMaterialMasks for this body
void GetComplexPhysicalMaterials ( [TArray](API\Runtime\Core\Containers\TArray)< [UPhysicalMaterial](API\Runtime\PhysicsCore\PhysicalMaterials\UPhysicalMaterial) * > & OutPhysMaterials, [TArray](API\Runtime\Core\Containers\TArray)< [FPhysicalMaterialMaskParams](API\Runtime\Engine\Physics\FPhysicalMaterialMaskParams) > & OutPhysMaterialMasks ) const